Nonlinear circular valley photogalvanic effect
| Autor: | V. M. Kovalev, M. V. Entin |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Electromagnetic field
Physics education.field_of_study Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics media_common.quotation_subject Population FOS: Physical sciences Trigonal crystal system Elliptical polarization Asymmetry Transition metal dichalcogenide monolayers Nonlinear system Mesoscale and Nanoscale Physics (cond-mat.mes-hall) education Intensity (heat transfer) media_common |
| DOI: | 10.48550/arxiv.2106.01600 |
| Popis: | We develop a theory of circular photogalvanic effect in non-gyrotropic two-dimensional transition metal dichalcogenide monolayers under interband optical transitions. Oblique incidence of circularly-polarized electromagnetic field or normal incidence of elliptically polarized electromagnetic field is assumed. In contrast to the linear-in-intensity conventional photogalvanic effect, the effect considered here arises in the second intensity order. The effect is conditioned by i) the predominant population of the valleys by the circular in-plane electromagnetic field component and ii) the direct drift of the photo-excited carriers by the linear-polarized in-plane electromagnetic field component in the presence of trigonal valley asymmetry. Comment: 7 pages, 2 figures |
| Databáze: | OpenAIRE |
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